cae·​si·​ous | \ ˈsēzēəs, ˈkī- \

Definition of caesious

: having a blue color very low in chroma

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

First Known Use of caesious

1798, in the meaning defined above

History and Etymology for caesious

Latin caesius; probably akin to Latin caelum sky

Keep scrolling for more

Learn More About caesious

Time Traveler for caesious

Time Traveler

The first known use of caesious was in 1798

See more words from the same year

Dictionary Entries Near caesious

Caesar weed



See More Nearby Entries 

Statistics for caesious

Cite this Entry

“Caesious.” Dictionary, Merriam-Webster, Accessed 19 Oct. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon


Test Your Vocabulary

Dog Words Quiz

  • shiba puppy more or less demanding cuddles
  • Which of the following animals has a dog in its etymology?
Spell It

Can you spell these 10 commonly misspelled words?

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!